17-4 PH
17-4 PH
(OP)
We had a 15+" diameter bar of condition A, ASTM A705, 17-4 PH double aged to condition H1150. The hardness came out around 37 HRC. NACE requires the hardness to be 33 HRC max.
1. Any ideas as to what went wrong?
2. Would there be any bebefit to repeating the double aging process?
1. Any ideas as to what went wrong?
2. Would there be any bebefit to repeating the double aging process?





RE: 17-4 PH
If the H1150,H1150 was done correctly you will not get the hardness down by redoing it.
Let me do some checking as you might use the overaging treatment to lower the hardness.
That is rather a large bar how did you take the hardness?
RE: 17-4 PH
You will need to hold at 1125 D.F. for at least 13.5 hours then set the temp. up to 115 D.F. for 4 hours at heat. Repeat for Double 115O NACE condition.
RE: 17-4 PH
What is the actual physical dimension of your part?
RE: 17-4 PH